db.php

<?php
    session_start();
    $host = 'localhost';
    $user = 'root';
    $password = '';
    $db = 'shop';

    $connect = mysqli_connect($host, $user, $password, $db);
    if(!$connect)
    {
        echo 'Ошибка подключения';
    }
    else
    {
        return true;
    }
    mysqli_select_db($db);
    mysqli_query("SET NAMES utf8");

?>